import { baseUrl } from "../../../request";
const { notLogin } = require('../../../utils/util')

// pages/course/courseOrderList/courseOrderList.js
Page({
  data: {
    orderList: [],          // 后端返回的订单列表
    hasModalShown: false,   // 本次停留页面只弹一次
    isMaskVisible: false
  },

  // —— 内部状态（不放 data，避免多余 setData）
  _timer: null,
  _isActive: false,         // 页面是否处于“可见/激活”状态
  _justEnteredAt: 0,        // 进入页面时刻（可按需使用）

  onLoad() {
    this._isActive = true;
    this._justEnteredAt = Date.now();
    this.fetchOrders();
  },
  onShow() {
    this._isActive = true;
    this.fetchOrders(); // 如不想重复拉取可注释
  },
  onHide() {
    this._isActive = false;
    this._clearTimer();
  },
  onUnload() {
    this._isActive = false;
    this._clearTimer();
  },

  onPullDownRefresh() {
    this.fetchOrders(); // stopPullDownRefresh 在 complete 里
  },

  // ========= 工具函数 =========
  _clearTimer() {
    if (this._timer) {
      clearInterval(this._timer);
      this._timer = null;
    }
  },
  _pad2(n) {
    return String(n).padStart(2, '0');
  },
  _fmtCountDownStr(totalSec) {
    const sec = Math.max(0, totalSec | 0);
    const m = Math.floor(sec / 60);
    const s = sec % 60;
    return `${this._pad2(m)}分${this._pad2(s)}秒`;
  },

  // ========= 拉单 =========
  fetchOrders() {
    wx.request({
      url: baseUrl + '/courseOrder/query/list',
      method: 'POST',
      header: { Authorization: wx.getStorageSync('token') },
      success: res => {
        if (res.data.code === 1) {
          const now = Date.now();
          const list = (res.data.data || []).map(it => {
            // 解析时间（iOS 兼容 + NaN 兜底）
            const ts = new Date(String(it.createTime).replace(/-/g, '/')).getTime();
            const createMs = Number.isFinite(ts) ? ts : now;

            // 统一按 15 分钟有效期（若后端返回 expireTime，建议直接用）
            const ttlMs = 15 * 60 * 1000;
            let diff = Math.floor((createMs + ttlMs - now) / 1000);
            diff = Math.max(0, diff);

            if (it.orderStatus === '待支付') {
              it.countDown = diff;
              it.countDownStr = this._fmtCountDownStr(diff);
              it._expiredNotified = false; // 每单的本地防重复标记

              // 初始化阶段：如果已经超时（diff=0），静默转关闭，不弹窗
              if (diff === 0) {
                it.orderStatus = '交易关闭';
                it.countDownStr = '';
              }
            } else {
              it.countDown = 0;
              it.countDownStr = '';
            }
            return it;
          });

          // 渲染 + 启动定时器
          this.setData({ orderList: list }, () => this._startTimer());
        } else {
          notLogin(res.data.message);
        }
      },
      fail: () => {
        wx.showToast({ title: '网络错误', icon: 'none' });
      },
      complete: () => {
        wx.stopPullDownRefresh();
      }
    });
  },

  // ========= 定时器刷新 =========
  _startTimer() {
    this._clearTimer();
    // 如果已经没有“待支付”的订单，就不启动定时器
    const hasPending = this.data.orderList.some(o => o.orderStatus === '待支付' && o.countDown > 0);
    if (!hasPending) return;

    this._timer = setInterval(() => {
      // 不在激活页时不做任何 UI 相关动作（同时兜底不弹窗）
      if (!this._isActive) return;

      let needRerender = false;
      const updated = this.data.orderList.map(item => {
        if (item.orderStatus === '待支付' && item.countDown > 0) {
          const next = item.countDown - 1;
          item.countDown = next;
          item.countDownStr = this._fmtCountDownStr(next);
          needRerender = true;

          if (next <= 0) {
            item.orderStatus = '交易关闭';
            item.countDownStr = '';

            // —— 仅在“当前页面可见”时弹一次，并且每单只弹一次；本页全局也只弹一次
            if (this._isActive && !item._expiredNotified && !this.data.hasModalShown) {
              item._expiredNotified = true;
              wx.showModal({
                title: '提示',
                content: '订单超时未支付，已关闭',
                showCancel: false
              });
              this.setData({ hasModalShown: true });
            }
          }
        }
        return item;
      });

      if (needRerender) {
        this.setData({ orderList: updated }, () => {
          // 如果已经没有可继续倒计时的订单，关掉定时器
          const stillPending = this.data.orderList.some(o => o.orderStatus === '待支付' && o.countDown > 0);
          if (!stillPending) this._clearTimer();
        });
      } else {
        // 没有需要更新的也关掉
        this._clearTimer();
      }
    }, 1000);
  },

  // ========= 支付相关 =========
  showIsPayModal(e) {
    const orderId = e.currentTarget.dataset.orderId;
    wx.showModal({
      title: '确认支付',
      content: '是否立即支付该订单？',
      cancelText: '取消',
      confirmText: '去支付',
      success: (res) => {
        if (res.confirm) {
          this.payOrder(orderId);
        } else if (res.cancel) {
          this.setData({ isMaskVisible: false });
        }
      },
      fail: () => {
        wx.hideLoading();
        wx.showToast({ title: '网络错误', icon: 'none' });
      }
    });
  },

  payOrder(orderId) {
    this.setData({ isMaskVisible: true });
    wx.showLoading({ title: '支付中...' });
    wx.request({
      url: baseUrl + '/courseOrder/payment',
      method: 'POST',
      header: { Authorization: wx.getStorageSync('token') },
      data: { id: orderId }, // 与后端约定：支付接口传 id；若传 orderId 则改键名
      success: res => {
        wx.hideLoading();
        if (res.data.code === 1) {
          wx.redirectTo({
            url: `/pages/course/orderDetail/orderDetail?id=${orderId}`,
            complete: () => {
              this.setData({ isMaskVisible: false });
            }
          });
        } else {
          this.setData({ isMaskVisible: false });
          wx.showToast({ title: res.data.message || '支付失败', icon: 'none' });
        }
      },
      fail: () => {
        wx.hideLoading();
        this.setData({ isMaskVisible: false });
        wx.showToast({ title: '网络错误，支付失败', icon: 'none' });
      }
    });
  },

  // ========= 跳转 & 取消 =========
  gotoOrderDetail(e) {
    const orderId = e.currentTarget.dataset.id;
    wx.navigateTo({
      url: `/pages/course/orderDetail/orderDetail?id=${orderId}`,
    });
  },

  cancelOrder(e) {
    const id = e.currentTarget.dataset.id;
    wx.showModal({
      title: '取消订单',
      content: '是否要取消该订单？',
      success: res => {
        if (res.confirm) {
          wx.request({
            url: baseUrl + "/courseOrder/cancel",
            method: 'POST',
            header: { Authorization: wx.getStorageSync('token') },
            data: { id }, // 如果后端需要 { orderId: id }，改这里的键名即可
            success: r => {
              if (r.data && r.data.code !== 1) {
                wx.showToast({ title: r.data.message || '取消失败', icon: 'none' });
              }
              this.fetchOrders();
            },
            fail: () => wx.showToast({ title: '网络错误', icon: 'none' })
          });
        }
      }
    });
  }
});